improved TablePreview.vue handling of weird input

src/components/subcomponents/view/TablePreview.vue

@@ -23,11 +23,11 @@ const page = ref(0)
 const itemsPerPage = ref(5)
 
 function sanitizeItemValue(v) {
-  if (v === null || v === undefined) return 'NA'
-  if (typeof v === 'string') return (v.length > 20 ? v.substring(0, 20) + '...' : v)
-  if (Array.isArray(v)) return v.join(', ')
-  if (typeof v === 'object') return JSON.stringify(v)
-  return v
+  let s = v
+  if (v === null || v === undefined) s = 'NA'
+  else if (Array.isArray(v)) s = v.join(', ')
+  else if (typeof v === 'object') s = JSON.stringify(v)
+  if (typeof s === 'string') return (s.length > 20 ? s.substring(0, 20) + '...' : s)
 }
 
 function loadItems({page, itemsPerPage}) {